Use the appropriate function to remove files in the stage directory (#29690)

We shouldn't be using "remove_linked_tree" to remove the lock file,
since that function expects to receive a directory path as an
argument.

Also, as a further measure to avoid regression, this commit restores
the "ignore_errors=True" argument on linux and adds a unit test
checking that "remove_linked_tree" doesn't change file permissions
as a side effect of a failure to remove.

0 files changed, 0 insertions, 0 deletions